// 短视频 云点播
package tencent

import (
	"crypto/hmac"
	"crypto/sha1"
	"encoding/base64"
	"encoding/json"
	"github.com/dgrijalva/jwt-go"
	"live/app/lib/config"
	"strconv"
	"time"

	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common"
	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common/errors"
	"github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/common/profile"
	vod "github.com/tencentcloud/tencentcloud-sdk-go/tencentcloud/vod/v20180717"
)

type short struct {
	secretId     string
	secretKey    string
	expire       int64
	oneTimeValid bool
	appId        string
	key          string
}

var Short *short

func init() {
	Short = &short{
		secretId:     config.Config.Section("tencent.short").Key("secretId").String(),
		secretKey:    config.Config.Section("tencent.short").Key("secretKey").String(),
		expire:       config.Config.Section("tencent.short").Key("expire").MustInt64(0),
		oneTimeValid: config.Config.Section("tencent.short").Key("oneTimeValid").MustBool(),
		appId:        config.Config.Section("tencent.short").Key("appId").String(),
		key:          config.Config.Section("tencent.short").Key("key").String(),
	}
}

// @Title 获取上传签名
func (s *short) Sign() string {
	timestamp := time.Now().Unix()
	expireTime := timestamp + s.expire
	timestampStr := strconv.FormatInt(timestamp, 10)
	expireTimeStr := strconv.FormatInt(expireTime, 10)

	random := Worker.Rander()
	randomStr := strconv.FormatUint(uint64(random), 10)
	original := "secretId=" + s.secretId + "&currentTimeStamp=" + timestampStr + "&expireTime=" + expireTimeStr + "&random=" + randomStr + "&procedure=recook"
	// 单次有效
	if s.oneTimeValid {
		original += "&oneTimeValid=1"
	}

	signature := generateHmacSHA1(s.secretKey, original)
	signature = append(signature, []byte(original)...)
	signatureB64 := base64.StdEncoding.EncodeToString(signature)
	return signatureB64
}

func generateHmacSHA1(secretToken, payloadBody string) []byte {
	mac := hmac.New(sha1.New, []byte(secretToken))
	sha1.New()
	mac.Write([]byte(payloadBody))
	return mac.Sum(nil)
}

// @Title 播放签名
func (s *short) SignPlay(fileId string) (string, error) {
	currentTime := time.Now().Unix()
	psignExpire := currentTime + 3600                   // 可任意设置过期时间，示例1h
	urlTimeExpire := strconv.FormatInt(psignExpire, 16) // 可任意设置过期时间，16进制字符串形式，示例1h

	// Create a new token object, specifying signing method and the claims
	// you would like it to contain.
	token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
		"appId":            s.appId,
		"fileId":           fileId,
		"currentTimeStamp": currentTime,
		"expireTimeStamp":  psignExpire,
		"urlAccessInfo": map[string]string{
			"t": urlTimeExpire,
		},
	})

	// Sign and get the complete encoded token as a string using the secret
	return token.SignedString([]byte(s.key))
}

type notify struct {
	EventType       string `json:"EventType"`
	FileUploadEvent struct {
		FileID         string `json:"FileId"`
		MediaBasicInfo struct {
			ClassID     int64  `json:"ClassId"`
			ClassName   string `json:"ClassName"`
			ClassPath   string `json:"ClassPath"`
			CoverURL    string `json:"CoverUrl"`
			CreateTime  string `json:"CreateTime"`
			Description string `json:"Description"`
			ExpireTime  string `json:"ExpireTime"`
			MediaURL    string `json:"MediaUrl"`
			Name        string `json:"Name"`
			SourceInfo  struct {
				SourceContext string `json:"SourceContext"`
				SourceType    string `json:"SourceType"`
			} `json:"SourceInfo"`
			StorageRegion string        `json:"StorageRegion"`
			TagSet        []interface{} `json:"TagSet"`
			Type          string        `json:"Type"`
			UpdateTime    string        `json:"UpdateTime"`
			Vid           string        `json:"Vid"`
		} `json:"MediaBasicInfo"`
		ProcedureTaskID string `json:"ProcedureTaskId"`
	} `json:"FileUploadEvent"`
}

func (s *short) Notify(data string) {
	dataStruct := notify{}
	err := json.Unmarshal([]byte(data), &dataStruct)
	if err != nil {
		return
	}
	// 文件上传通知
	if dataStruct.EventType == "NewFileUpload" {

	}
}

type FileResult struct {
	Response struct {
		NotExistFileIdSet []string `json:"NotExistFileIdSet"`
		MediaInfoSet      []struct {
			BasicInfo struct {
				CoverUrl   string `json:"CoverUrl"`
				MediaUrl   string `json:"MediaUrl"`
				SourceInfo struct {
					SourceType string `json:"SourceType"`
				} `json:"SourceInfo"`
			} `json:"BasicInfo"`
			FileId string `json:"FileId"`
		} `json:"MediaInfoSet"`
	} `json:"Response"`
}

// @Title 获取视频信息
func (s *short) GetInfo(fileId string) (result FileResult, err error) {
	credential := common.NewCredential(
		s.secretId,
		s.secretKey,
	)
	cpf := profile.NewClientProfile()
	cpf.HttpProfile.Endpoint = "vod.tencentcloudapi.com"
	client, _ := vod.NewClient(credential, "", cpf)

	request := vod.NewDescribeMediaInfosRequest()
	jsonData := map[string][]string{
		"FileIds": {fileId},
	}
	params, _ := json.Marshal(jsonData)
	err = request.FromJsonString(string(params))
	if err != nil {
		return
	}
	response, err := client.DescribeMediaInfos(request)
	if _, ok := err.(*errors.TencentCloudSDKError); ok {
		return
	}
	if err != nil {
		return
	}
	err = json.Unmarshal([]byte(response.ToJsonString()), &result)
	return
}